Subtract 18/20 from 30/16
1st number: 1 14/16, 2nd number: 18/20
30/16 - 18/20 is 39/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
30/16 = 30 × 5/16 × 5 = 150/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
18/20 = 18 × 4/20 × 4 = 72/80 - Subtract the two like fractions:
150/80 - 72/80 = 150 - 72/80 = 78/80 - After reducing the fraction, the answer is 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/16-18/20 30/16-36/20 30/32-18/20 30/16-18/40 90/16-18/20 30/16-54/20 30/48-18/20 30/16-18/60 30/16-90/20 30/80-18/20